Computer right click/ Properties / Advanced System Settings / Hardware / Device Installation Settings / Check Never install drivers from Windows Update.
Try installing the driver from the below site firstly - it may uninstall the generic driver automatically with the installer, if it wont - uninstall the driver in device manager, and reboot, hopefully, the above settings will prevent it from installing.
If the driver wont install normally because of a OS mismatch do the following
To install a driver OR program in compatibility mode - right click the setup.exe file - click properties - click compatibility - check run in compatibility with vista/xp etc - check run as administrator - leave the rest blank. Start setup.exe and install.
Acer driver Page : Service & Support